When irradiated leeches grow huge in a Southern bayou, a local storekeeper (Bruno Ve Sota) sees his chance to be rid of his two-timing wife (Yvette Vickers) --feed her to the leeches! Instead, the giant leeches take her hostage in their underwater cavern of horror. Other townsfolk are soon abducted by the leeches as well, and the locals desperately battle the mammoth creatures in an explosive climax! This 1959 flick was executive produced by Roger Corman.